|EMG of the Shoulder|
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Reasons for Test
- Aid in diagnosing the source of pain, cramping, or weakness in the muscles and nerves
- Differentiate between true muscle weakness and limitations due to pain
- Determine if muscles are working properly
- Distinguish between muscle and nerve disorders
What to Expect
Prior to Test
- Anti-inflammatory drugs, such as aspirin
- Blood thinners, such as clopidogrel (Plavix), warfarin (Coumadin), or ticlopidine (Ticlid)
- If you have myasthenia gravis, ask if you should take any medicine before the test.
- If directed to, avoid cigarettes, coffee, tea, and soft drinks for 2-3 hours before the test.
- Take a bath or shower before the test.
- On the day before, do not use lotion or oil.
- Wear comfortable clothing, but expect to change into a hospital gown.
- Tell your doctor if you have a pacemaker or other implanted device.
Description of the Test
- Resume any medicines you stopped before the test.
- Resume normal activities as tolerated.
How Long Will It Take?
Will It Hurt?
Call Your Doctor
- Signs of infection, including fever and chills
- Redness, swelling, increasing pain, excessive bleeding, or discharge around the needle sites
National Institutes of Health http://www.nih.gov
National Institute of Neurological Disorders and Stroke http://www.ninds.nih.gov
Health Canada http://www.hc-sc.gc.ca/index%5Fe.html
Muscular Dystrophy Canada http://www.muscle.ca
Electromyography (EMG). Mayo Clinic.com website. Available at: http://www.mayoclinic.com/health/emg/MY00107. Updated August 2010. Accessed November 12, 2010.
What to expect during your EMG test. American Association of Neuromuscular & Electrodiagnostic Medicine website. Available at: http://www.aanem.org/Education/Patient-Resources/Learn-About-an-EMG.aspx. Updated March 2005. Accessed June 5, 2008.
Young RR, Hutton JT, Homan RV. Gait and movement disorders. American Academy of Neurology website. Available at: http://www.aan.com/familypractice/html/chp8.htm. Accessed June 5, 2008.
- Reviewer: Lawrence Frisch, MD, MPH
- Update Date: 09/26/2011 -